Side by side

Serica Ref. 5303 Diving ChronometervsDryden Heartlander Automatic

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

Ref. 5303 Diving Chronometer
SericaRef. 5303 Diving Chronometer
MSRP $1,768
Heartlander Automatic
DrydenHeartlander Automatic
MSRP $600

At a glance

13 of 29 specs differ
Diameter
Ref. 5303 Diving Chronometer39mm
Heartlander Automatic38mm
Power Reserve
Ref. 5303 Diving Chronometer42h
Heartlander Automatic40h
Water Resistance
Ref. 5303 Diving Chronometer300m
Heartlander Automatic101m
MSRP
Ref. 5303 Diving Chronometer$1,768
Heartlander Automatic$600

Full specifications

Case

5 specs
Category
Diver
Field
Diameter
39mm
38mm
Thickness
12.2mm
11.2mm
Lug-to-Lug
46.5mm
46mm
Water Resistance
300m
101m

Crystal & Dial

4 specs
Crystal
Sapphire
Domed Sapphire
AR Coating
Yes
Inner
Dial Color
Enamel Black
Goldfinch
Lume
Super-LumiNova
None

Movement

3 specs
Caliber
M100 COSC
Miyota 9039
Power Reserve
42h
40h
Complications
COSC
None

Pricing

1 specs
MSRP
$1,768
$600

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What people say

Owners + reviewers, side by side

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Serica Ref. 5303 Diving Chronometer

Owners widely praise the Serica Ref. 5303 Diving Chronometer for its excellent wearability, definitive style, and smooth, confident bezel action. The dual scale on the bezel is noted as surprisingly useful, and the crown action, winding, and hacking are reported to work perfectly. One owner describes the Serica 5303-3 as gorgeous and unique, though another notes the crown can appear comically large. On balance, owners rate the Serica Ref. 5303 Diving Chronometer highly for its blend of unique design and robust functionality.

Dryden Heartlander Automatic

The Dryden Heartlander Automatic is widely praised for its versatility, comfortable 38mm case that wears smaller than its dimensions suggest, and excellent dial variety. Reviewers highlight its value at $500, noting good finishing, a domed sapphire crystal, and 100m water resistance. The tapering bracelet with solid links is also considered comfortable. One owner notes the crown may protrude slightly and irritate some wearers. On balance, owners and reviewers rate the Dryden Heartlander Automatic highly for its combination of wearability, features, and value.

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